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Chemical Engineering - Heat Transfer

Exercise : Heat Transfer - Section 10
41.
Low thermal conductivity of heat insulating materials is due to its
dense structure.
high proportion of air space.
high specific heat.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
42.
The most conducive surface for dropwise condensation to occur is the __________ surface.
coated
oily
glazed & polished
smooth
Answer: Option
Explanation:
No answer description is available. Let's discuss.
43.
In an interphase heat transfer process, the equilibrium state corresponds to equality of temperature in the two phases, while the condition for equilibrium in an interphase mass transfer process is equality of
concentrations
chemical potentials
activity co-efficients
mass transfer co-efficients
Answer: Option
Explanation:
No answer description is available. Let's discuss.
44.
Calburn analogy is applicable for the value of Prandtl number from
0.001 to 1
0.6 to 120
0.5 to 5
120 to 400
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
Pick out the correct equation.
jH = (St)(Pr)2/3 = f/2
jH = (St)(Pr)1/3 = f/2
jH = (St)2/3(Pr) = f/2
jH = (St)1/3(Pr) = f/2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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